cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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axp20x-rsb.c (2221B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * RSB driver for the X-Powers' Power Management ICs
      4 *
      5 * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
      6 * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
      7 * as well as configurable GPIOs.
      8 *
      9 * This driver supports the RSB variants.
     10 *
     11 * Copyright (C) 2015 Chen-Yu Tsai
     12 *
     13 * Author: Chen-Yu Tsai <wens@csie.org>
     14 */
     15
     16#include <linux/acpi.h>
     17#include <linux/err.h>
     18#include <linux/mfd/axp20x.h>
     19#include <linux/module.h>
     20#include <linux/of.h>
     21#include <linux/regmap.h>
     22#include <linux/slab.h>
     23#include <linux/sunxi-rsb.h>
     24
     25static int axp20x_rsb_probe(struct sunxi_rsb_device *rdev)
     26{
     27	struct axp20x_dev *axp20x;
     28	int ret;
     29
     30	axp20x = devm_kzalloc(&rdev->dev, sizeof(*axp20x), GFP_KERNEL);
     31	if (!axp20x)
     32		return -ENOMEM;
     33
     34	axp20x->dev = &rdev->dev;
     35	axp20x->irq = rdev->irq;
     36	dev_set_drvdata(&rdev->dev, axp20x);
     37
     38	ret = axp20x_match_device(axp20x);
     39	if (ret)
     40		return ret;
     41
     42	axp20x->regmap = devm_regmap_init_sunxi_rsb(rdev, axp20x->regmap_cfg);
     43	if (IS_ERR(axp20x->regmap)) {
     44		ret = PTR_ERR(axp20x->regmap);
     45		dev_err(&rdev->dev, "regmap init failed: %d\n", ret);
     46		return ret;
     47	}
     48
     49	return axp20x_device_probe(axp20x);
     50}
     51
     52static void axp20x_rsb_remove(struct sunxi_rsb_device *rdev)
     53{
     54	struct axp20x_dev *axp20x = sunxi_rsb_device_get_drvdata(rdev);
     55
     56	axp20x_device_remove(axp20x);
     57}
     58
     59static const struct of_device_id axp20x_rsb_of_match[] = {
     60	{ .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
     61	{ .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
     62	{ .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
     63	{ .compatible = "x-powers,axp809", .data = (void *)AXP809_ID },
     64	{ .compatible = "x-powers,axp813", .data = (void *)AXP813_ID },
     65	{ },
     66};
     67MODULE_DEVICE_TABLE(of, axp20x_rsb_of_match);
     68
     69static struct sunxi_rsb_driver axp20x_rsb_driver = {
     70	.driver = {
     71		.name	= "axp20x-rsb",
     72		.of_match_table	= of_match_ptr(axp20x_rsb_of_match),
     73	},
     74	.probe	= axp20x_rsb_probe,
     75	.remove	= axp20x_rsb_remove,
     76};
     77module_sunxi_rsb_driver(axp20x_rsb_driver);
     78
     79MODULE_DESCRIPTION("PMIC MFD sunXi RSB driver for AXP20X");
     80MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
     81MODULE_LICENSE("GPL v2");